points_in_circle: Filter observations within circle

In spatialrisk: Calculating Spatial Risk

Filter observations within circle

Description

Filter all observations in a data.frame that fall within a circle of a specified radius drawn around a given latitude and longitude point.

Usage

points_in_circle(
  data,
  lon_center,
  lat_center,
  lon = lon,
  lat = lat,
  radius = 200
)

Arguments

data	data.frame with at least columns for longitude and latitude.
lon_center	numeric. Representing the longitude of the circle's center.
lat_center	numeric. Representing the latitude of the circle's center.
lon	column name in data containing longitudes (default is lon).
lat	column name in data containing latitudes (default is lat).
radius	radius of the circle in meters (default is 200m).

Value

A subset of the input data.frame containing only the observations that fall within the specified circle.

Author(s)

Martin Haringa

Examples

points_in_circle(Groningen, lon_center = 6.571561, lat_center = 53.21326,
radius = 60)

spatialrisk documentation built on June 8, 2025, 9:40 p.m.